function click (e) {
  if (!e)
    e = window.event;
  if ((e.type && e.type == "contextmenu") || (e.button && e.button == 2) || (e.which && e.which == 3)) {
    if (window.opera)
      window.alert("Sorry: Diese Funktion ist deaktiviert.");
    return false;
  }
}
if (document.layers)
  document.captureEvents(Event.MOUSEDOWN);
document.onmousedown = click;
document.oncontextmenu = click;


function fal(e){
	return false;
}

function tru(){
	return true;
}
document.onselectstart=new Function ("return false");
if (window.sidebar){
	document.onmousedown=fal;
	document.onclick=tru;
}